Counterpane (acq. by BT)

Counterpane Systems is a data security monitoring service that monitors the firewalls and intrusion detection products protecting corporate networks. David Cowan invested in its early rounds and served on the board until the company's acquisition by BT (NYSE: BT) in 2006.

eEye Digital Security

eEye offers an integrated suite of vulnerability-management software that focuses on eliminating vulnerabilities, rather than merely thwarting attacks. eEye is now a subsidiary of BeyondTrust, which acquired the company in 2012.

Internet Identity (IID)

IID is a collaborative threat intelligence platform that enables enterprises and public agencies to combat cyberattacks by sharing incident data in real time. In February 2016, IID was acquired by Infoblox, Inc. (NASDAQ: BLOX).

Lifelock

LifeLock, Inc. is an industry leader in identity theft protection. The company has been relentlessly protecting its members’ identities by providing consumers with the tools and confidence they need to help protect themselves from identity theft and to manage their credit. Lifelock went public in October 2012 (NYSE: LOCK) and was acquired by Symantec in 2017.

Nominum

Nominum is a pioneering provider of IP-address infrastructure software for enterprises that require reliable and secure DNS, DHCP and IP address management for their mission-critical networks. Nominum was acquired by Akamai Technologies (NASDAQ: AKAM) in November 2017.

ON Technology (acq. by Symantec)

Leading provider of LAN applications and utilities for Novell networks that acquired DaVinci Systems. The company went public (NASDAQ:ONTC). ON was acquired in 2002 by Symantec (NASDAQ:SYMC) and the company's CEO, Chris Risley, became a BVP operating partner.